summaryrefslogtreecommitdiffstats
path: root/src/compiler/glsl/float64.glsl
diff options
context:
space:
mode:
Diffstat (limited to 'src/compiler/glsl/float64.glsl')
-rw-r--r--src/compiler/glsl/float64.glsl32
1 files changed, 32 insertions, 0 deletions
diff --git a/src/compiler/glsl/float64.glsl b/src/compiler/glsl/float64.glsl
index 6a763ffdab0..c6ba37221af 100644
--- a/src/compiler/glsl/float64.glsl
+++ b/src/compiler/glsl/float64.glsl
@@ -451,6 +451,38 @@ __roundAndPackFloat64(uint zSign,
return __packFloat64(zSign, zExp, zFrac0, zFrac1);
}
+uint64_t
+__roundAndPackUInt64(uint zSign, uint zFrac0, uint zFrac1, uint zFrac2)
+{
+ bool roundNearestEven;
+ bool increment;
+ uint64_t default_nan = 0xFFFFFFFFFFFFFFFFUL;
+
+ roundNearestEven = FLOAT_ROUNDING_MODE == FLOAT_ROUND_NEAREST_EVEN;
+
+ if (zFrac2 >= 0x80000000u)
+ increment = false;
+
+ if (!roundNearestEven) {
+ if (zSign != 0u) {
+ if ((FLOAT_ROUNDING_MODE == FLOAT_ROUND_DOWN) && (zFrac2 != 0u)) {
+ increment = false;
+ }
+ } else {
+ increment = (FLOAT_ROUNDING_MODE == FLOAT_ROUND_UP) &&
+ (zFrac2 != 0u);
+ }
+ }
+
+ if (increment) {
+ __add64(zFrac0, zFrac1, 0u, 1u, zFrac0, zFrac1);
+ if ((zFrac0 | zFrac1) != 0u)
+ zFrac1 &= ~(1u) + uint(zFrac2 == 0u) & uint(roundNearestEven);
+ }
+ return mix(packUint2x32(uvec2(zFrac1, zFrac0)), default_nan,
+ (zSign !=0u && (zFrac0 | zFrac1) != 0u));
+}
+
/* Returns the number of leading 0 bits before the most-significant 1 bit of
* `a'. If `a' is zero, 32 is returned.
*/